The heuristic rules are based on (i) lengths of work-zone dividing line, (ii) fluctuations of daily duration, and (iii) utilisation rates of resource. As such, in this research study, three heuristic rules are proposed for choosing better scheme of work-zone. Yet, there is no past research studied the evaluation of work-zone definition schemes. In practice, the definition of work-zone is dependent on the experience of project manager. Once the work-zones are defined, the resources (labour, plant, materials) will be allocated to a specific zone to deliver the works on a particular day of the 6-day construction cycle. Work-zones are defined in the working platform for better allocation of limited resources. In Hong Kong, 6-day construction cycle always being used for constructing one typical floor of concrete building superstructure in a week. Furthermore, this approach integrates 4D BIM applications into construction design procedures, connected with OA automation. Originality/value-Unlike conventional construction estimation methods which need various tools and are error prone and time-consuming, the developed method bypasses the existing time estimation tools and provides the integrated and automated process with BIM and machine learning algorithms. By using this approach, the start and finish dates of all object-based activities are developed, and the project completion time is automatically estimated. The prototype was successfully linked with BIM Timeliner application. Different OAs were applied and compared, and the genetic algorithm was found as the best performing one.
The developed processes and porotypes were linked and integrated.įindings-The OA-based automated 4D BIM estimation prototype was developed and validated through a real-life construction project. A suite of OA including particle swarm optimization, ant colony, differential evolution and genetic algorithm were developed and compared in order to facilitate and automate the estimation process. Purpose-This research aims to develop an automated and optimization algorithms (OAs)-integrated 4D building information modeling (BIM) approach and a prototype and enable construction managers and practitioners to estimate the time of compound elements in building projects using the resource specification technique.ĭesign/methodology/approach-A 4D BIM estimation process was first developed by applying the resource specification and geometric information from the BIM model.
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